package com.atguigu.springcloud.alibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;

import com.atguigu.springcloud.alibaba.service.PaymentService;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;


@RestController
@Slf4j
public class CircleBreakerController {

	public static final String SERVICE_URL = "http://nacos-payment-provider";

	@Resource
	private RestTemplate restTemplate;



	@RequestMapping("/consumer/fallback/{id}")
//	@SentinelResource(value = "fallback") //没有配置
//	@SentinelResource(value = "fallback",fallback = "handlerFallback") //fallback只负责业务异常
//	@SentinelResource(value = "fallback",blockHandler = "blockHandler") //blockHandler只负责sentinel控制台配置违规
	@SentinelResource(value = "fallback",fallback = "handlerFallback",blockHandler = "blockHandler",
			exceptionsToIgnore = {IllegalArgumentException.class})
	public CommonResult<Payment> fallback(@PathVariable Long id) {
		CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/"+id, CommonResult.class,id);

		if (id == 4) {
			throw new IllegalArgumentException ("IllegalArgumentException,非法参数异常....");
		}else if (result.getData() == null) {
			throw new NullPointerException ("NullPointerException,该ID没有对应记录,空指针异常");
		}

		return result;
	}

	//fallback
	public CommonResult handlerFallback(@PathVariable  Long id,Throwable e) {
		Payment payment = new Payment(id,"null");
		return new CommonResult<>(444,"兜底异常handlerFallback,exception内容  "+e.getMessage(),payment);
	}

	//blockHandler
	public CommonResult blockHandler(@PathVariable  Long id,BlockException blockException) {
		Payment payment = new Payment(id,"null");
		return new CommonResult<>(445,"blockHandler-sentinel限流,无此流水: blockException  "+blockException.getMessage(),payment);
	}

	// OpenFeign
	@Resource
	private PaymentService paymentService;

	@GetMapping(value = "/consumer/paymentSQL/{id}")
	public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
		return paymentService.paymentSQL(id);
	}
}